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Finding the Fourth Proportional to 380.07, 523.23 and 330.90

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Solution

The fourth proportional to 380.07, 523.23 and 330.90 is: 455.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.07 : 523.23 = 330.90 : x
  2. Step 2: Convert to fraction form
    380.07/523.23 = 330.90/x
  3. Step 3: Cross multiply
    380.07x = 523.23 × 330.90
  4. Step 4: Simplify right side
    380.07x = 173,136.81
  5. Step 5: Solve for x
    x = 173,136.81/380.07
  6. Step 6: Final answer
    x = 455.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.